Process for producing pure sugar liquors



Patented Feb. 1, 1927.

UNITED STATES PATENT oFFicE.

CARL FREDRIK KULLGREN AND SVEN GUSTAI" LIND, OF STOCKHOLM, SWEDEN. I I v rRooEss FOR PRODUCING PURE SUGAR LIQUoRs. I

No Drawing. Application filed October 5, was, Serial No. 60,690, and in sweaen Ma 13,19'25.;,

According to this invention artificially produced silicic acid is used as a purifying means, which we have found able to draw 1 out the colouring matter as well asunorganic matter in the liquors. juices as molasses, which otherwise are difficult to decolorize, can be purified with the help of artificial silicic acid. q I

The necessary silicic acid can be produced in the well known way by treatment of a silicate, for instancesodium silicate, with an acid. The silicic acid received in thisway is to be dried andcrushed or granulated to fy 2 diflerent sizes according to the needs.

Such an artlficlal silicic acld can wlthout danger be exposed to high temperatures.

By experiments at a temperature of about 1000 F. we have found that the purifying 3O able, in spite 'of the percentage of water being much lowered. The percentage of water in the material, also including the chemically combined water, may consequently vary without preventing the use of the material for the stated purpose. I

Due to these conditions, the used silicic acid can be regenerated without lessening its purifying ability. The regeneration can i be done by washing, for instance with water, followed by heating.

Even such silicic acid being afterwards regeneratedby 1 ing follow-ed byheating.

ability of the silicic acid still is consider treatment of an alkali silicate with an acid.

The purifying and decoloriz ingare best carried out by forcing the sugar'liquor from below through tanks filled with silicic acid. Thereupon, if necessary, the liquor may be passed through a-filtering press.

Weclaimz' y p I 1. Av process for producing pure sugar].

liquors consisting therein that. the. sugar'l I liquor is forced through a layer or layers 5 of a purifying means consisting of silicic acid, produced in theknown way by treatf,"

ment of analkali silicatewith an acid.

2. A. process for producing pure sugar liquors; consisting therein that the sugar I liquor is forced through a layeror' layers of I a purifying means consisting of silicic acid, i produced in the known way by treatment off an alkali silicate with an acid, the used heating. q

i 3. A process for producing pure sugar liq-v uors consistingtherein that the sugar liquor '1 is forced through a layer or layers of a puris ing means consisting offsilicic acid, ro; duced in the. known way by treatment of an alkali silicate. with an acid, the used silicic a acid being afterwards regenerated by wash--gf 4. A process for producing pure sugar liquors consisting therein that the sugar liquor is forced upwards from ,below throughcontainers containing a layer or layers" of a purifying means consisting of silicic acid, produced in the known way by] In witness whereof we have hereunto set. I our hands. q g I CARL FREDRIK KULLGREN. 1

1 E S AF LINE. 

